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YK MASON & SONS INC

Trust Score

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Company CheckYK MASON & SONS INC · DOT 3765071

Private carrier, runs its own trucks and hauls its own freight

DBA: YK MASON SCAFFOLD COMPANY

2323 CLIPPER ST, SAN MATEO, CA, 94403-1005

DOT# 3765071 San Mateo, California

PRIVATE CARRIER

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Power Units

Drivers

Crashes (24-Month)

Not reported

Insurance

Not Rated

Safety Rating

Inspections

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Public record

1 events tracked · latest May 9, 2025 ↓ Show details ↓

Safety & compliance 1

May 9, 2025
Roadside inspection, 1 violation (no OOS).

Public FMCSA record · blue clean · orange change · red risk.

Contact Details

Phone(415) 467-1788

Fax(415) 822-1895

Email[email protected]

Physical Address2323 CLIPPER ST, SAN MATEO, CA, 94403-1005

Mailing Address2323 CLIPPER ST, SAN MATEO, CA, 94403-1005

Other Companies at This Address

Address2323 CLIPPER ST, SAN MATEO, CA 94403-1005

Others here

Distinct phones

Active

Company	DOT	Phone	Status
YK MASON & SONS INC this company	3765071	(415) 467-1788	Active
YK MASON CONSTRUCTION INC	2760598	(415) 806-0057	Active

Note: sharing an address is legal and common (registered agents, virtual offices, business centers). A shared address never reduces the Trust Score.

Operating Authorities

Authority TypePRIVATE PROPERTY

Carrier OperationC - Intrastate (Non-Hazmat)

CommonN/A

ContractN/A

BrokerN/A

Company Overview

YK MASON & SONS INC is a FMCSA-validated private carrier based in San Mateo, California. The fleet consists of 3 power units and 3 drivers. The company has a clean safety record with zero reported crashes. Based on authority, insurance, safety, and compliance data, YK MASON & SONS INC has a Trust Score of 87/100 (Excellent).

Operation Classification

Private (Property)Private Only

Drivers

Interstate

Intrastate

CDL

Total

Interstate >100mi0

Interstate <100mi0

Intrastate >100mi0

Intrastate <100mi0

Equipment

No equipment breakdown on file with FMCSA.

HazMatNo

Safety Summary

No safety rating or inspection data on file with FMCSA.

Insurance

AmountNot reported

Type-

Effective-

Company-

Policy #-

Quick Facts

StatusActive

TypePrivate Carrier

Fleet3 units

Drivers3

MCS-15011/2021

Safety Trends by Year

Roadside inspections and crashes on file, year over year. The red portion of each inspection bar is the out-of-service share; ▲/▼ compares to the prior year.

Inspections · red = OOS

2025

1 · 0 OOS —

Crashes

No crashes on record.

Based on FMCSA crash and roadside inspection records (rolling 3-year window). The latest year may be partial.

Out-of-Service Summary Last 24 months

Live FMCSA roadside inspections through May 2025 — 1 inspections, 0 resulted in out-of-service (0% OOS rate).

Clean — no out-of-service violations in the last 24 months.

Live FMCSA roadside inspection records, refreshed monthly.

Roadside Violations by Safety Category Last 24 months

1 roadside violations across 1 inspections, grouped into FMCSA safety-behavior categories. The shaded portion shows how many were serious enough to result in an out-of-service order.

ViolationsOut-of-service

Unsafe Driving 1 violation · 0 OOS

Categories follow FMCSR violation parts (Part 393/396 = Vehicle Maintenance, Part 395 = HOS; "Other" = general/administrative parts such as 390). Raw violation counts and out-of-service results — not FMCSA percentile rankings, which are not published for property carriers.

Inspection Records (1)

Date	State	Level	Location	Violations	OOS	Driver Viol	Driver OOS	Vehicle Viol	Vehicle OOS	HazMat
05/09/2025 ▼	CA	Driver-Only (Level III)	7TH ST AND BRYANT ST	1	0	0	0	1	0	-
Violations (1) 392.2-SLLSOA — Failing to Secure Cargo Non-OOS (Unsafe Driving)

Licensing & Insurance

No insurance history records.

No active insurance policies.

No authority history.

No revocation records.

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Trust Score over time and the complete authority and insurance timeline, not just today.

87/100

Excellent

VERIFIED

Every carrier starts at 100. We subtract points for each missing requirement or risk factor below. Verified means all four core requirements pass.

Score breakdown — from 100 to 87

−10

Starts at 100−13 totalFinal 87

MCS-150 update overdue−10

Operating history unknown−3

Verification — 4 core requirements

Active operating authority

FMCSA shows the USDOT registration and authority are active.

Operating authority N/A

Not required for private carriers — a private carrier hauls its own goods and needs no for-hire operating authority (no MC number) under FMCSA.

Insurance on file with FMCSA N/A

Not required for private carriers — a non-hazmat private carrier hauling its own goods is generally not required to file proof of insurance with FMCSA.

Safety rating not Unsatisfactory

No Unsatisfactory rating on file.

What's lowering this score

-10

MCS-150 update overdue

The required biennial MCS-150 update has not been filed on time (score factor, not a verification failure).

-3

Operating history unknown

No authority grant date on file.

How we calculate the Trust Score

Every company starts at 100

We subtract points for each missing requirement or risk factor. Verified means all the core requirements for that company's type pass. Nothing is added back — the score is a deduction model built only on public FMCSA data. No pay-to-play, no opinions.

Requirements differ by company type

Each company is judged fairly on its own FMCSA obligations. Anything that doesn't apply shows as a grey N/A — not required — never a penalty.

Carrier (for-hire)

Operating authority, authorized-for-hire, insurance on file, safety rating.

Broker

Broker authority + $75k surety bond (BMC-84/85). MCS-150 not required (no fleet).

Freight forwarder

FF authority + $75k bond + BOC-3. MCS-150 not required (no trucks).

Private carrier

Active USDOT + MCS-150 + safety. No operating authority / for-hire / insurance filing required (hauls its own goods).

Crashes are scaled, not flat

Crash history is proportional. We don't apply a flat penalty — we scale it to (a) crashes per vehicle in the fleet and (b) the share of those crashes that were fatal. So a big, safe fleet barely moves; a small fleet with many (and fatal) crashes takes a large hit.

0 pts deductedscaled by rate & severityup to −28 pts

Low end

50,000 vehicles + 1 crash → ~0 pts. A huge fleet with very few crashes per vehicle is almost untouched.

High end

5 vehicles + 3 crashes incl. fatal → large deduction (near the −28 cap). Many crashes per truck, fatal-heavy.

Mechanics: deduction is capped at 28 points, weighted roughly 60% on crashes-per-vehicle and 40% on the fatal ratio. Zero crashes = zero deduction. If fleet size is unknown, only crash severity can move the score (conservative).

Out-of-service rate vs. the national average

Driver and vehicle out-of-service rates are measured against the FMCSA national average, not a flat number. A company only takes the deduction when it sits above the national benchmark — for example “Vehicle OOS 37% vs national avg 20.7%”.

Point reference — the full menu

Every factor and exactly how many points it can remove. Knockout factors (they also fail Verification) are marked.

Factor	Points
USDOT / authority not active with FMCSA knockout	−25
Missing operating authority (when required) knockout	−15
No insurance or surety bond on file (when required) knockout	−25
Unsatisfactory safety rating knockout	−30
Conditional safety rating	−12
MCS-150 biennial update overdue (carriers) knockout	−10
Crashes — rate-adjusted (per-vehicle & fatal share)	0 to −28
Driver OOS rate above national average	−5
Vehicle OOS rate above national average	−5
Very new carrier (under 1 year)	−10
Limited operating history (1-3 years)	−6
Moderate operating history (3-5 years)	−3
Operating history unknown	−3
No public phone number	−3
No public email address	−2

All inputs come from public FMCSA records (operating authority, insurance/bond filings, the SAFER/SMS safety profile, crash & inspection reports). If FMCSA updates a record, the score updates with it. For the full deduction table, see the methodology page.

Who is Highway App, Inc.?

YK MASON & SONS INC

Trust Score

Public record

Company Information

Contact Details

Other Companies at This Address

Operating Authorities

Company Overview

Operation Classification

Drivers

Equipment

Safety Summary

Insurance

Quick Facts

Safety Trends by Year

Out-of-Service Summary Last 24 months

Roadside Violations by Safety Category Last 24 months

Inspection Records (1)

Licensing & Insurance

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